A ranger with a 92W Military Occupational Specialty (MOS), which pertains to water purification, would likely be stationed at a location where water supply and purification are critical, such as a forward operating base or a combat support area. They might also be assigned to units deployed in remote or austere environments where clean water is essential for troop operations. Additionally, they could be stationed at training facilities or installations focused on logistics and support operations.
Latitudes need a designator of either north or south, while longitudes need a designator of east or west. Without those, there are four possible locations. 35N 92W: Just off of Hwy 67, east of Austin, Arkansas 35N 92E: In a desert on a high plateu in Tibet. I see no sign of any villages or habitations. 35S 92W: A thousand miles west of Peru. 35S 92E: 1200 miles west of the southwestern tip of Australia.
A point at 31 degrees south and 92 degrees west lies along the 92 degrees west line of longitude. The line of longitude represents the angular distance, measured in degrees, west or east from the Prime Meridian (0 degrees).